Microfluidic-oriented synthesis of enriched iridium nanodots/carbon architecture for robust electrocatalytic nitrogen fixation  

作　　者：Hengyuan Liu Xingjiang Wu Yuhao Geng Xin Li Jianhong Xu 

机构地区：[1]The State Key Laboratory of Chemical Engineering,Department of Chemical Engineering,Tsinghua University,Beijing,100084,China

出　　处：《Green Energy & Environment》2024年第3期544-555,共12页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China(22025801)and(22208190);National Postdoctoral Program for Innovative Talents(BX2021146);Shuimu Tsinghua Scholar Program(2021SM055).

摘　　要：Electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising candidate to achieve ammonia synthesis because of clean electric energy,moderate reaction condition,safe operating process and harmless by-products.However,the chemical inertness of nitrogen and poor activated capacity on catalyst surface usually produce low ammonia yield and faradic efficiency.Herein,the microfluidic technology is proposed to efficiently fabricate enriched iridium nanodots/carbon architecture.Owing to in-situ co-precipitation reaction and microfluidic manipulation,the iridium nanodots/carbon nanomaterials possess small average size,uniform dispersion,high conductivity and abundant active sites,producing good proton activation and rapid electrons transmission and moderate adsorption/desorption capacity.As a result,the as-prepared iridium nanodots/carbon nanomaterials realize large ammonia yield of 28.73 μg h^(-1) cm^(-2) and faradic efficiency of 9.14%in KOH solution.Moreover,the high ammonia yield of 11.21 μg h^(-1) cm^(-2) and faradic efficiency of 24.30%are also achieved in H_(2)SO_(4) solution.The microfluidic method provides a reference for large-scale fabrication of nano-sized catalyst materials,which may accelerate the progress of electrocatalytic NRR in industrialization field.

关 键 词：Iridium nanodots CARBON Microfluidic technology Efficient synthesis Electrocatalytic nitrogen fixation 

分 类 号：TQ113.26[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TQ426