Au nanoclusters anchored on TiO_(2) nanosheets for high-efficiency electroreduction of nitrate to ammonia  

作　　者：Miaosen Yang Tianran Wei Jia He Qian Liu Ligang Feng Hongyi Li Jun Luo Xijun Liu 

机构地区：[1]School of Chemical Engineering,Northeast Electric Power University,Jilin 132012,China [2]Nanchang Institute of Technology,Nanchang 330044,China [3]State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,College of Chemistry,Xinjiang University,Urumqi 830017,China [4]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials,School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [5]Institute for New Energy Materials and Low-Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China [6]Institute for Advanced Study,Chengdu University,Chengdu 610106,China [7]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China [8]Guangzhou Panyu Polytechnic,Guangzhou 511483,China [9]ShenSi Lab,Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Longhua District,Shenzhen 518110,China

出　　处：《Nano Research》2024年第3期1209-1216,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22075211 and 51971157);the Guangzhou Basic&Applied Basic Research Project(No.202201011853);the Shenzhen Science and Technology Program(Nos.JCYJ20210324115412035,JCYJ20210324123202008,JCYJ20210324122803009,and ZDSYS20210813095534001);the Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110880);the Tianjin Science Fund for Distinguished Young Scholars(No.19JCJQJC61800).

摘　　要：Electrocatalytic nitrate reduction reaction(NO_(3)RR)offers a unique rationale for green NH_(3) synthesis,yet the lack of high-efficiency NO_(3)RR catalysts remains a great challenge.In this work,we show that Au nanoclusters anchored on TiO_(2) nanosheets can efficiently catalyze the conversion of NO_(3)RR-to-NH_(3) under ambient conditions,achieving a maximal Faradic efficiency of 91%,a peak yield rate of 1923μg·h^(-1)·mgcat.-1,and high durability over 10 consecutive cycles,all of which are comparable to the recently reported metrics(including transition metal and noble metal-based catalysts)and exceed those of pristine TiO_(2).Moreover,a galvanic Zn-nitrate battery using the catalyst as the cathode was proposed,which shows a power density of 3.62 mW·cm^(-2) and a yield rate of 452μg·h^(-1)·mgcat.-1.Theoretical simulations further indicate that the atomically dispersed Au clusters can promote the adsorption and activation of NO_(3)-species,and reduce the NO_(3)RR-to-NH_(3) barrier,thus leading to an accelerated cathodic reaction.This work highlights the importance of metal clusters for the NH_(3) electrosynthesis and nitrate removal.

关 键 词：NH3 electrosynthesis Zn-nitrate battery Au nanoclusters nitrate reduction reaction(NRR) TiO_(2)nanosheets 

分 类 号：O64[理学—物理化学]