远洋海岛的和平开发与利用在我国的海洋战略中占有极其重要的地位。对于远洋海岛中需要通过船运对负荷中心岛进行能量支援的资源富集岛而言,其离岸可再生能源消纳设备(renewable energy absorption facility,REAF)的高效运行至关重要。...远洋海岛的和平开发与利用在我国的海洋战略中占有极其重要的地位。对于远洋海岛中需要通过船运对负荷中心岛进行能量支援的资源富集岛而言,其离岸可再生能源消纳设备(renewable energy absorption facility,REAF)的高效运行至关重要。针对此问题,该文设计兼顾蓄–氢–冷多能源形式的制氢装置,有效提升了REAF系统能源吸收效率;同时,基于快速决策树剪枝算法及强化学习式蒙特卡洛算法设计包含蓄–氢–冷的REAF系统的综合调度策略。仿真算例表明,该文提出的决策树快速剪枝算法及改进强化学习式蒙特卡洛算法能够有效提升REAF系统调度策略的能源消纳能力。最后探讨进一步提升基于这2种算法的REAF系统调度策略性能的路径。展开更多
Efficient,stable,and noble‐metal‐free electrocatalysts for both the oxygen evolution reaction and the hydrogen evolution reaction are highly imperative for the realization of low‐cost commercial water‐splitting el...Efficient,stable,and noble‐metal‐free electrocatalysts for both the oxygen evolution reaction and the hydrogen evolution reaction are highly imperative for the realization of low‐cost commercial water‐splitting electrolyzers.Herein,a cost‐effective and ecofriendly strategy is reported to fabricate coral‐like FeNi(OH)x/Ni as a bifunctional electrocatalyst for overall water splitting in alkaline media.With the assistance of mild corrosion of Ni by Fe(NO3)3,in situ generated FeNi(OH)x nanosheets are intimately attached on metallic coral‐like Ni.Integration of these nanosheets with the electrodeposited coral‐like Ni skeleton and the supermacroporous Ni foam substrate forms a binder‐free hierarchical electrode,which is beneficial for exposing catalytic active sites,accelerating mass transport,and facilitating the release of gaseous species.In 1.0 mol L^-1 KOH solution,a symmetric electrolyzer constructed with FeNi(OH)x/Ni as both the anode and the cathode exhibits an excellent activity with an applied potential difference of 1.52 V at 10 mA cm^-2,which is superior to that of an asymmetric electrolyzer constructed with the state‐of‐the‐art RuO2‐PtC couple(applied potential difference of 1.55 V at 10 mA cm^-2).This work contributes a facile and reliable strategy for manufacturing affordable,practical,and promising water‐splitting devices.展开更多
The development of hydrogen redox electric power generators for infinite cruising range electric vehicles represents a true technological breakthrough. Such systems consist of a polymer electrolyte membrane hydrogen e...The development of hydrogen redox electric power generators for infinite cruising range electric vehicles represents a true technological breakthrough. Such systems consist of a polymer electrolyte membrane hydrogen electrolytic cell equipped with an electrostatic-induction potential-superposed water electrolytic cell that provides a stoichiometric H2-O2 fuel mixture during operation of the vehicle. This generator functions with zero power input, zero matter input and zero emission due to the so-called ＂zero power input＂ electrostatic-to-chemical energy conversion occurring in the electrolytic cell. Here, theoretical simulations were performed to verify the target performance of such generators, assuming a pair of FC （fuel cell） and electrolytic cell stacks, both of which are commercially available.展开更多
文摘远洋海岛的和平开发与利用在我国的海洋战略中占有极其重要的地位。对于远洋海岛中需要通过船运对负荷中心岛进行能量支援的资源富集岛而言,其离岸可再生能源消纳设备(renewable energy absorption facility,REAF)的高效运行至关重要。针对此问题,该文设计兼顾蓄–氢–冷多能源形式的制氢装置,有效提升了REAF系统能源吸收效率;同时,基于快速决策树剪枝算法及强化学习式蒙特卡洛算法设计包含蓄–氢–冷的REAF系统的综合调度策略。仿真算例表明,该文提出的决策树快速剪枝算法及改进强化学习式蒙特卡洛算法能够有效提升REAF系统调度策略的能源消纳能力。最后探讨进一步提升基于这2种算法的REAF系统调度策略性能的路径。
文摘Efficient,stable,and noble‐metal‐free electrocatalysts for both the oxygen evolution reaction and the hydrogen evolution reaction are highly imperative for the realization of low‐cost commercial water‐splitting electrolyzers.Herein,a cost‐effective and ecofriendly strategy is reported to fabricate coral‐like FeNi(OH)x/Ni as a bifunctional electrocatalyst for overall water splitting in alkaline media.With the assistance of mild corrosion of Ni by Fe(NO3)3,in situ generated FeNi(OH)x nanosheets are intimately attached on metallic coral‐like Ni.Integration of these nanosheets with the electrodeposited coral‐like Ni skeleton and the supermacroporous Ni foam substrate forms a binder‐free hierarchical electrode,which is beneficial for exposing catalytic active sites,accelerating mass transport,and facilitating the release of gaseous species.In 1.0 mol L^-1 KOH solution,a symmetric electrolyzer constructed with FeNi(OH)x/Ni as both the anode and the cathode exhibits an excellent activity with an applied potential difference of 1.52 V at 10 mA cm^-2,which is superior to that of an asymmetric electrolyzer constructed with the state‐of‐the‐art RuO2‐PtC couple(applied potential difference of 1.55 V at 10 mA cm^-2).This work contributes a facile and reliable strategy for manufacturing affordable,practical,and promising water‐splitting devices.
文摘The development of hydrogen redox electric power generators for infinite cruising range electric vehicles represents a true technological breakthrough. Such systems consist of a polymer electrolyte membrane hydrogen electrolytic cell equipped with an electrostatic-induction potential-superposed water electrolytic cell that provides a stoichiometric H2-O2 fuel mixture during operation of the vehicle. This generator functions with zero power input, zero matter input and zero emission due to the so-called ＂zero power input＂ electrostatic-to-chemical energy conversion occurring in the electrolytic cell. Here, theoretical simulations were performed to verify the target performance of such generators, assuming a pair of FC （fuel cell） and electrolytic cell stacks, both of which are commercially available.
