Abstract
One key step for advancing the widespread practical application of rechargeable metal-air batteries and water electrolysis fundamentally relies on the development of cost-effective multifunctional electrocata-lysts toward oxygen and hydrogen-involving reactions.The present work initiates a tofu-derived one-pot strategy for green,facile,and mass production of highly active and stable catalyst toward oxygen reduc-tion/evolution and hydrogen evolution reactions,through the preparation of Fe/Co cross-linked tofu gel and the subsequent pyrolysis.Despite the free use of additional N/P precursors or pore-forming agents,the as-prepared materials comprise highly dispersive FeCo-rich phosphides nanoparticles and porous N,P co-doped carbon network inherited from the tofu skeleton.The resultant catalysts exhibit remarkably enhanced trifunctional activities as compared to the Fe2P and Co2P counterparts,along with better long-term stabilities than the benchmark RuO2 and Pt/C catalysts.Accordingly,the as-assembled Zn-air battery delivers a large power density(174 mW cm-2)with excellent cycle stability(the gap of charge/discharge voltage@10 mA cm-2 increases by 0.01 V after 720 h of operation,vs.0.16 V of Pt/C-RuO2 based battery after 378 h).Furthermore,the as-constructed alkaline electrolyzer just requires a small voltage of 1.55 V@10 mA cm-2,which outperforms nearly all of those of biomass-derived electrocatalysts ever reported,and that of noble metal catalysts-based electrolyzers(1.72 V@10 mA cm-2 for Pt/C-RuO2),underscoring their bright future toward commercial applications in green energy conversion devices.
基金项目
国家杰出青年科学基金(52025041)
国家自然科学基金(51702176)
国家自然科学基金(51974021)
Zhejiang Provincial Nature Science Foundation(LY20E020009)
Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(FRF-IDRY-21-028)
NETL
NSTL
万方数据