Promoting electroreduction of nitrite to ammonia over electron-deficient Pd modulated by rectifying Schottky contacts  

作　　者：Shaobo Zhang Yabo Guo Lu-Hua Zhang Zhihao Feng Bo Zhang Yaheng Wang Fengshou Yu 

机构地区：[1]School of Chemical Engineering,Hebei University of Technology,Tianjin 300131,China

出　　处：《Journal of Energy Chemistry》2024年第11期524-530,共7页能源化学（英文版）

摘　　要：Electrochemical nitrite reduction reaction(NO_(2)^(-)RR) is a potential sustainable route for regulating the nitrogen cycle and ambient ammonia(NH_(3)) synthesis.However,it remains a challenge to precisely regulate the reaction pathways and inhibit competing reactions(e.g.hydrogenolysis) for efficient and selective NH_(3) production in an aqueous solution environment.Here,we utilize the Schottky barrier-induced surface electric field to construct high-density electron-deficient Pd nanoparticles by modulating the N content in the carbon carrier to promote the enrichment and immobilization of NO_(2)^(-)on the electrode surface,which ensures the ultimate selectivity for NH_(3).With these properties,Pd@N_(0.14)C with the highest N content achieved excellent catalytic performance for the reduction of NO_(2)^(-)to NH_(3) with the 100% Faraday efficiency at-0.5 and-0.6 V vs,reversible hydrogen electrode(RHE) for NH_(3) production,which was significantly better than Pd/C and Pd@N_(x)C samples with lower N content.This study opens new avenues for rational construction of efficient electrocatalysts for nitrite removal and NH_(3) electrosynthesis.

关 键 词：ELECTROCATALYTIC Nitrite reduction reaction Electronic structure AMMONIA 

分 类 号：TQ113.2[化学工程—无机化工] TQ426