Zhang Junbo, Yin Rongguan, Shao Qi, Zhu Ting, Huang Xiaoqing
College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123, Jiangsu, China.
Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices, East China University of Technology, Jiangxi, 330013, Nanchang, China.
Angew Chem Int Ed Engl. 2019 Apr 16;58(17):5609-5613. doi: 10.1002/anie.201900167. Epub 2019 Mar 20.
Tuning surface electron transfer process by oxygen (O)-vacancy engineering is an efficient strategy to develop enhanced catalysts for CO electroreduction (CO ER). Herein, a series of distinct InO NRs with different numbers of O-vacancies, namely, pristine (P-InO ), low vacancy (O-InO ) and high-vacancy (H-InO ) NRs, have been prepared by simple thermal treatments. The H-InO 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-InO and O-InO NRs. The H-InO 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-InO NRs, which optimizes CO adsorption/activation and facilitates electron transfer for efficient CO ER.
通过氧（O）空位工程调节表面电子转移过程是开发用于CO电还原（CO ER）的增强型催化剂的有效策略。在此，通过简单的热处理制备了一系列具有不同O空位数量的独特InO纳米棒，即原始（P-InO）、低空位（O-InO）和高空位（H-InO）纳米棒。H-InO纳米棒表现出增强的性能，在很宽的电位范围内具有高达91.7%的最佳甲酸（HCOOH）选择性以及高HCOOH分电流密度，大大优于P-InO和O-InO纳米棒。H-InO纳米棒更耐用，在连续运行超过20小时后活性衰减有限。性能的提高归因于非晶态H-InO纳米棒中丰富的O空位，其优化了CO的吸附/活化并促进了电子转移以实现高效的CO ER。
