Oxygen Vacancies in Amorphous InOx Nanoribbons Enhance CO2 Adsorption and Activation for CO2 Electroreduction
Oxygen Vacancies in Amorphous InOx Nanoribbons Enhance CO2 Adsorption and Activation for CO2 Electroreduction
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非晶态 InOx 纳米带中的氧空位增强 CO2 吸附和 CO2 电还原活化
DOI：
10.1002/anie.201900167
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发表时间：
2019-04-16
影响因子：
16.6
通讯作者：
Huang, Xiaoqing
中科院分区：
文献类型：
--
作者：
Zhang, Junbo;Yin, Rongguan;Huang, Xiaoqing
利用氧空位工程调整表面电子转移过程是开发CO2电还原增强型催化剂的有效途径。本文通过简单的热处理制备了一系列具有不同o空位数的不同的InOx NRs，即原始（P-InOx）、低空位（O-InOx）和高空位（H-InOx） NRs。H-InOx NRs表现出更强的性能，其最佳甲酸（HCOOH）选择性高达91.7%，在大电位范围内具有较高的HCOOH偏电流密度，在很大程度上优于P-InOx和O-InOx NRs。h - inox NRs更耐用，并且在连续运行超过20小时后活性衰减有限。性能的改善归功于无定形h - inox NRs中丰富的o -空位，这优化了CO2吸附/活化，促进了电子转移，实现了高效的CO2ER。
Tuning surface electron transfer process by oxygen (O)-vacancy engineering is an efficient strategy to develop enhanced catalysts for CO2 electroreduction (CO2ER). Herein, a series of distinct InOx NRs with different numbers of O-vacancies, namely, pristine (P-InOx), low vacancy (O-InOx) and high-vacancy (H-InOx) NRs, have been prepared by simple thermal treatments. The H-InOx NRs show enhanced performance with a best formic acid (HCOOH) selectivity of up to 91.7% as well as high HCOOH partial current density over a wide range of potentials, largely outperforming those of the P-InOx and O-InOx NRs. The H-InOx NRs are more durable and have a limited activity decay after continuous operating for more than 20 h. The improved performance is attributable to the abundant O-vacancies in the amorphous H-InOx NRs, which optimizes CO2 adsorption/activation and facilitates electron transfer for efficient CO2ER.