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Ultrarapid in Situ Synthesis of Cu2S Nanosheet Arrays on Copper Foam with Room-Temperature-Active Iodine Plasma for Efficient and Cost-Effective Oxygen Evolution
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-03-26 00:00:00 , DOI: 10.1021/acscatal.8b00032
Liangbo He , Dan Zhou , Yao Lin , Ruixiang Ge , Xiandeng Hou , Xuping Sun , Chengbin Zheng

Developing simple and cost-effective methods for the rapid synthesis of oxygen evolution reaction (OER) electrocatalysts from earth-abundant elements is a highly desired yet challenging task. Herein we report a two-step strategy based on the use of a room-temperature- and atmospheric-pressure-active iodine DBD plasma and an anion exchange reaction for the in situ generation of 3D Cu2S nanosheet arrays on Cu foam (Cu2S/CF). Owing to the advantages of this plasma-based approach, and the extremely rapid anion exchange reaction between the generated CuI and S2–, synthesis of the Cu2S/CF OER catalyst can be accomplished within 6 min. The porous 3D catalyst exhibited prominent electrocatalytic activity and persistent stability (>10 h) for OER with an overpotential of 336 mV to drive a geometrical current density of 20 mA cm–2 in 1.0 M KOH, comparable to the performance of a noble-metal IrO2/CF electrode.

中文翻译:

具有室温活性碘等离子体的铜泡沫上的超快速原位合成Cu 2 S纳米片阵列,可实现高效且具有成本效益的氧气释放

开发简单且具有成本效益的方法以从富含地球的元素快速合成氧释放反应(OER)电催化剂是一项非常需要但又极具挑战性的任务。本文中,我们基于室温和大气压下活性的碘DBD等离子体和阴离子交换反应,在铜泡沫(Cu 2上原位生成3D Cu 2 S纳米片阵列)的基础上,报告了两步策略S / CF)。由于这种基于等离子体的方法的优势,以及生成的CuI和S 2–之间极快的阴离子交换反应,因此Cu 2的合成S / CF OER催化剂可在6分钟内完成。多孔3D催化剂对OER具有336 mV的超电势,在1.0 M KOH中驱动20 mA cm –2的几何电流密度,表现出杰出的电催化活性和持久稳定性(> 10 h),与贵金属的性能相当IrO 2 / CF电极。
更新日期:2018-03-26
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