纳米团簇
钌
联氨(抗抑郁剂)
氢
碳纤维
兴奋剂
化学
无机化学
氢气储存
材料科学
光化学
纳米技术
催化作用
有机化学
复合数
光电子学
色谱法
复合材料
作者
Yapeng Li,Shuwen Niu,Peigen Liu,Rongrong Pan,Huaikun Zhang,Nazir Ahmad,Yi Shi,Xiao Liang,Mingyu Cheng,Shenghua Chen,Junyi Du,Mao‐Lin Hu,Dingsheng Wang,Wei Chen,Yadong Li
标识
DOI:10.1002/ange.202316755
摘要
The hydrazine oxidation‐assisted H2 evolution method promises low‐input and input‐free hydrogen production. However, developing high‐performance catalysts for hydrazine oxidation (HzOR) and hydrogen evolution (HER) is challenging. Here, we introduce a bifunctional electrocatalyst α‐MoC/N‐C/RuNSA, merging ruthenium (Ru) nanoclusters (NCs) and single atoms (SA) into cubic α‐MoC nanoparticles‐decorated N‐doped carbon (α‐MoC/N‐C) nanowires, through electrodeposition. The composite showcases exceptional activity for both HzOR and HER, requiring ‐80 mV and ‐9 mV respectively to reach 10 mA cm‐2. Theoretical and experimental insights confirm the importance of two Ru species for bifunctionality: NCs enhance the conductivity, and its coexistence with SA balances the H adsorption for HER and facilitates the initial dehydrogenation during the HzOR. In the overall hydrazine splitting (OHzS) system, α‐MoC/N‐C/RuNSA excels as both anode and cathode materials, achieving 10 mA cm‐2 at just 64 mV. The zinc hydrazine (Zn‐Hz) battery assembled with α‐MoC/N‐C/RuNSA cathode and Zn foil anode can exhibit 96% energy efficiency, as well as temporary separation of hydrogen gas during the discharge process. Therefore, integrating Zn‐Hz with OHzS system enables self‐powered H2 evolution, even in hydrazine sewage. Overall, the amalgamation of NCs with SA achieves diverse catalytic activities for yielding multifold hydrogen gas through advanced cell‐integrated‐electrolyzer system.
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