Policy & Socio-Economics

The energy transition towards low-carbon hydrogen (H2) in France is expected to require deep industrial planning to develop electrolysis and H2 production infrastructure. This study employs an input–output method to simulate a new sector of electrolysis-produced hydrogen (e-H2) that supplies two-hydrogen intensive sectors petroleum refining and ammonia. We construct two input–output models a demand-driven model for e-H2 sector development (the investment phase) and a mixed model for e-H2 production (the operation phase). The results demonstrate that the e-H2 sector depends on industries such as machinery electrical equipment construction and metal products manufacturing in the investment phase with strong backward linkages to the power sector in the exploitation phase. The results reveal that the energy shock (350 kt of e-H2 per year) generates significant growth (€1.3 Bn of gross domestic product) and jobs (3600) but strongly depends on industries’ capability to expand and recruit. Recommendations advise public policy development to address the need to reinforce key industries to support e-H2 production due to inter-industry dependence and the need for more attractive skilled and technician jobs in sectors that are already experiencing recruitment tensions. At much higher e-H2 shocks in the steel sector (700 kt e-H2) and other industries (415 kt e-H2) even greater amounts of domestic resources would be required. Therefore de-carbonising the entire H2 sector require ambitious policy planning to support industrial empowerment research programmes and labour training so that H2 becomes an enabling technology of the energy transition.

The conventional electrolysis is recognized as a mature and promising hydrogen (H2) production technology but there is still a strong need for further performance improvement. In this regard achieving an effective H2 evolution reaction at the cathode requires costly catalysts such as platinum and various catalyst-modified electrode materials. Nevertheless these materials are expensive and involve complex production procedures. Due to an increasing interest in deploying biomaterial-based cathodes as potential alternatives to conventional cathode materials we make the focus of this study on such materials and a graphite-loaded bioelectrode is in this regard synthesized for electrolysis application for effective H2 production. The surface morphology and electrochemical activity of the produced biocathode are characterized. Our results show that the H2 production performance of the system improves with the increasing graphite dosage on the biocathode and with the applied voltage ranging from 2 to 6 V. At improved operating conditions the highest H2 production rate of 1000 ppm (8.18 mg/m3 min) is obtained using a 1.5 g graphite-loaded biocathode at an applied voltage of 6 V. Consequently the produced graphite-loaded biocathode can be a promising option for sustainable and effective H2 production with waste minimization owing to its high conductivity low-cost and good stability.

China is developing renewable energy bases (REBs) in the desert and Gobi regions. However the intermittency of renewable energy and the temporal mismatch between peak renewable generation and peak load demand severely disrupt the power supply reliability of these REBs. Hydrogen storage technology characterized by high energy density and long-term storage capability is an effective method for enhancing the power supply reliability. Therefore this paper proposes a REB planning model in the desert and Gobi regions considering seasonal hydrogen storage introduction as well as electricity-carbon-hydrogen markets trading. Furthermore a combination scenario generation method considering extreme scenario optimization is proposed. Among which the extreme scenarios selected through an iterative selection method based on maximizing scenario divergence contain more incremental information providing data support for the proposed model. Finally the simulation was conducted in the desert and Gobi regions of Yinchuan Ningxia Province China primarily verifying that (1) the REB incorporating hydrogen storage can fully leverage hydrogen storage to achieve seasonal and long-term electricity transfer and utilization. The project has a payback period of 10 years with an internal rate of return of 13.30% and a return on investment of 16.34% thus showing significant development potential. (2) Compared to the typical battery-involved REB the hydrogen-involved energy storage facility achieved a 59.39% annual profit a 10.98% internal rate of return a 14.93% return on investment and a 1.51% improvement in power supply reliability by sacrificing a 52.49% increase in construction cost. (3) Compared to REB planning based only on typical scenarios the power supply reliability of REBs based on the proposed combination scenario generation method improved by 8.58%.

With the growing significance of hydrogen in the global energy transition research on its pricing mechanisms has become increasingly crucial. Focusing on hydrogen markets predominantly supplied by electrolytic production this study proposes a nodal marginal hydrogen price decomposition algorithm that explicitly incorporates the time-delay dynamics inherent in hydrogen transmission. A four-dimensional price formation framework is established comprising the energy component network loss component congestion component and time-delay component. To address the nonconvex optimization challenges arising in the market-clearing model an improved second-order cone programming method is introduced. This method effectively reduces computational complexity through the reconstruction of time-coupled constraints and reformulation of the Weymouth equation. On this basis the analytical expression of the nodal marginal hydrogen price is rigorously derived elucidating how transmission dynamics influence each price component. Empirical studies using a modified Belgian 20-node system demonstrate that the proposed pricing mechanism dynamically adapts to load variations with hydrogen prices exhibiting a strong correlation with electricity cost fluctuations. The results validate the efficacy and superiority of the proposed approach in hydrogen energy market applications. This study provides a theoretical foundation for designing efficient and transparent pricing mechanisms in emerging hydrogen markets.

Hybrid renewable energy systems (HRESs) are an effective tool for addressing the challenges of rural electrification in sub-Saharan Africa (SSA). However their viability is limited by the lifespan environmental impacts high costs and inefficiency of conventional energy storage technologies (battery and pumped-hydro). This study examines a hydrogen-based energy storage system combined with photovoltaic (PV) and wind energy for the electrification of Dargalla a village in northern Cameroon. The goal is to meet community and agricultural electricity needs while optimizing the system. The analysis utilized HOMER software to simulate model and optimize the system. The optimal architecture consisted of a 50-kW photovoltaic (PV) array a 10-kW wind turbine a 10-kW fuel cell a 30-kW electrolyser a 25-kg hydrogen tank and a 10-kW converter. The optimised system’s net present cost and cost of energy were assessed at USD 138202 and USD 0.443/kWh respectively. Sensitivity analysis results showed that areas with high wind speeds would be mainly suitable for the proposed system. Moreover with the upcoming decrease in the costs of fuel cells and PV components such systems are expected to become more economically viable in the future leading to the conclusion that integration of hydrogen-based energy storage technology in HRESs in SSA can effectively address the United Nations Sustainable Development Goals (UNSDG) and the historic Paris Climate Agreement (HCA).

The urgent need to mitigate climate change has elevated green hydrogen as a sustainable alternative to fossil fuels while green cryptocurrencies have emerged to address the environmental concerns of traditional cryptocurrency mining. This study investigates the dynamic correlation between the green hydrogen market and selected green cryptocurrencies (Cardano Stellar Hedera Algorand and Chia) from July 2021 to April 2024 utilizing the Dynamic Conditional Correlation GARCH (DCC-GARCH) model with robustness checks using EGARCH and GJR-GARCH specifications. Our findings reveal significant correlations with peaks reaching up to 50% in 2022 a period likely influenced by the Russia-Ukraine conflict. Subsequently a decline in these correlations was observed in 2023. These results underscore the interconnectedness of sustainability-driven markets suggesting potential contagion effects during periods of global instability. The high persistence of correlation shocks (α + β values approaching unity) indicates that correlation regimes tend to be long- lasting with important implications for portfolio diversification and risk management strategies. Robustness checks using EGARCH and GJR-GARCH specifications confirmed qualitatively similar patterns reinforcing the validity of our findings into the evolving landscape of green finance and energy

Given the Kenyan challenges in energy availability accessibility and affordability exploring green hydrogen as a sustainable energy solution is supreme. This study aimed to assess the potential of green hydrogen production a transformative clean energy technology and its implications for Kenya's future energy. The specific objectives were to identify the drivers of change that could accelerate green hydrogen adoption and policy recommendations. The study employed a scenario planning approach focusing on four key steps: defining the scenario and time horizon identifying drivers of change and developing and applying scenarios. The diffusion of innovation theory guided the study. Twelve key critical drivers of change were identified with societal and industry acceptance of green hydrogen and compatibility with existing energy infrastructure being the strongest drivers of change from cross-impact analysis results. The study outlined four plausible future scenarios for adoption: Successful Production (best scenario) Low Production Chaotic Transition and Rejection of Green Hydrogen Production (worst scenario). Major opportunities include advancements in hydrogen production export potential and job creation. Cost competitiveness analysis is essential comparing Kenya's hydrogen with traditional fuels and African peers. Economic models suggest that Kenya's renewable energy can lower costs enhancing its position in clean energy innovation. However critical challenges involve regulatory uncertainty ethical concerns public misconceptions about green hydrogen safety and financial barriers due to high initial investment costs. The study recommended that the Kenyan government invest in renewable energy infrastructure formulate a comprehensive national hydrogen policy and establish an enabling environment to attract private investment. In conclusion green hydrogen production stands as a strategic pillar for Kenya’s sustainable energy transition and further research should focus on strengthening regulatory frameworks and enhancing public engagement to unlock its full potential.

Transformation of the energy sector is necessary to meet climate targets and ensure universal access to reliable and affordable energy. Despite progress more than 675 million people still lack electricity and 770 million face an unreliable power supply. Renewable energy now provides nearly 30 % of global electricity generation and represents approximately 17.9 % of total final energy consumption. This amount is insufficient for the 1.5 ◦C pathway and requires a tripling of renewable capacity by 2030. Energy efficiency also lags with average annual gains of 1.6 % compared with the 4 % required for climate-aligned energy scenarios. Therefore this paper reviews pathways toward decentralized low-carbon solutions that can accelerate global energy transformation. The review paper examines how technologies such as microgrids virtual power plants energy storage systems and vehicleto-grid (V2G) solutions are reshaping modern energy systems. It highlights that digitalization smart grids and sector integration are key to building flexible and consumer-focused networks. However achieving sustainable energy access requires more than new technologies. Strong governance fair financing and social inclusion are equally important to ensure a just and balanced energy transition. Case studies from Asia Africa and Latin America show how policy innovative financing and regional cooperation can drive progress despite challenges such as underinvestment fossil fuel dependency and energy poverty. The review demonstrates that an integrated approach combining technological innovation financial mechanisms and inclusive policies can collectively build low-carbon resilient and equitable energy systems.