催化作用
过电位
锌
化学
无机化学
硝酸锌
双功能
电池(电)
双功能催化剂
电化学
材料科学
有机化学
电极
功率(物理)
物理化学
物理
量子力学
作者
Jingwen Zhou,Yi Xiong,Mingzi Sun,Zhihang Xu,Yunhao Wang,Pengyi Lu,Fu Liu,Fengkun Hao,Tianyi Feng,Yangbo Ma,Jinwen Yin,Chenliang Ye,Biao Chen,Shibo Xi,Ye Zhu,Bolong Huang,Zhanxi Fan
标识
DOI:10.1073/pnas.2311149120
摘要
Zinc-nitrate batteries can integrate energy supply, ammonia electrosynthesis, and sewage disposal into one electrochemical device. However, current zinc-nitrate batteries still severely suffer from the limited energy density and poor rechargeability. Here, we report the synthesis of tetraphenylporphyrin (tpp)-modified heterophase (amorphous/crystalline) rhodium-copper alloy metallenes (RhCu M-tpp). Using RhCu M-tpp as a bifunctional catalyst for nitrate reduction reaction (NO3RR) and ethanol oxidation reaction in neutral solution, a highly rechargeable and low-overpotential zinc-nitrate/ethanol battery is successfully constructed, which exhibits outstanding energy density of 117364.6 Wh kg-1cat, superior rate capability, excellent cycling stability of ~400 cycles, and potential ammonium acetate production. Ex/in situ experimental studies and theoretical calculations reveal that there is a molecule-metal relay catalysis in NO3RR over RhCu M-tpp that significantly facilitates the ammonia selectivity and reaction kinetics via a low energy barrier pathway. This work provides an effective design strategy of multifunctional metal-based catalysts toward the high-performance zinc-based hybrid energy systems.
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