化学
过电位
电解质
电化学
分解
反应性(心理学)
环境压力
无机化学
化学工程
分析化学(期刊)
电极
热力学
物理化学
有机化学
医学
物理
替代医学
病理
工程类
作者
Yao Song,Xiao Yang,Huan Liu,Suxia Liang,Yafeng Cai,Wenqiang Yang,K. Zhu,Liang Yu,Xiaoju Cui,Dehui Deng
摘要
Electrochemical conversion of CH4 to easily transportable and value-added liquid fuels is highly attractive for energy-efficient CH4 utilization, but it is challenging due to the low reactivity and solubility of CH4 in the electrolyte. Herein, we report a high-pressure electro-Fenton (HPEF) strategy to establish a hetero-homogeneous process for the electrocatalytic conversion of CH4 by O2 at room temperature. In combination with elevation of reactant pressure to accelerate reaction kinetics, it delivers an unprecedented HCOOH productivity of 11.5 mmol h-1 gFe-1 with 220 times enhancement compared to that under ambient pressure. Remarkably, an HCOOH Faradic efficiency of 81.4% can be achieved with an ultralow cathodic overpotential of 0.38 V. The elevated pressure not only promotes the electrocatalytic reduction of O2 to H2O2 but also increases the reaction collision probability between CH4 and •OH, which is in situ generated from the Fe2+-facilitated decomposition of H2O2.
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