Electronic Metal–Support Interaction Triggering Interfacial Charge Polarization over CuPd/N‐Doped‐C Nanohybrids Drives Selectively Electrocatalytic Conversion of Nitrate to Ammonia

Abstract

The data that support the findings of this study are available in the supplementary material of this article.

Design of material regulatory mechanism for electrocatalytic converting NO/NO3−to NH3progress

“…designed and synthesized metal–organic framework (MOF)‐derived bimetallic CuPd NPs/N‐doped carbon (CuPd/CN) hybrid nanoarrays (Figure 6e). 137,138 Cu and Pd possess modulated electronic structure and serve as dual active sites for catalyzing selectively EAS conversion, achieving FE NH3 of 96.16% and NH 3 selectivity of 92.08%. Moreover, Co‐doped Fe sites in the Fe 2 O 3 lattice (Co–Fe@Fe 2 O 3 ) form the single phase due to little structural change and transform the adsorption energy of intermediates and products, thus enhancing catalytic performance for the NO 3 RR 139 .…”

Recent progress and strategies on the design of catalysts for electrochemical ammonia synthesis from nitrate reduction

“…Consequently, there has been a dramatic growth in research efforts to study the ambient electrochemical reduction of NO 3 − to NH 3 . 15–17 However, the NO 3 − RR is an eight-electron reaction process and generates various by-products, such as NO 2 − , NO, N 2 O, N 2 , and NH 2 OH, resulting in low NH 3 selectivity, FE and yield rate. 18–20 Such electrocatalytic performance is mainly determined by the electrocatalysts; hence, the major challenge in large-scale production of NH 3 via the NO 3 − RR lies in finding a suitable catalyst.…”

“…[1][2][3] At present, the synthesis of NH 3 in industry mainly hinges on the traditional Haber-Bosch process (HBP). Such a reaction process is accomplished under tough operating con-ditions, including high temperature (400-550 °C) and high pressure (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), which is extremely energy-consuming. 4,5 Taking the enormous requirements into consideration (∼170 Mt per year, over 80% of total content for fertilizers), the HBP consumes 1-2% of the world's energy supply and is accompanied by extensive CO 2 emissions.…”

“…Consequently, there has been a dramatic growth in research efforts to study the ambient electrochemical reduction of NO 3 − to NH 3 . [15][16][17] However, the NO 3…”

Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

“…To improve the intrinsic activity of Cu, researchers have developed various strategies to optimize its electronic state, such as by (i) engineering Cu into nanoscale or a single reaction site; , (ii) doping Cu with other elements (Pd, P, Ni and etc. ) − or decorating it with a surface ligand; (iii) depositing Cu on a metal oxide support. , Among these strategies, depositing Cu on metal oxides is the most preferable one owing to the simplicity of synthesis and the considerable benefit from the strong metal–support interactions . It has been documented that metal–support interactions give rise to electron-deficient Cu species (Cu δ+ ). ,, These Cu δ+ species are more active than Cu 0 in adsorbing and activating intermediate N-species, affording a relatively low energy barrier for NO3RR. ,− With its excellent chemical stability and surface acidity, TiO 2 has become a well-known support for use in metal-based catalysis in various reaction systems (CO oxidation, Fischer–Tropsch process, and water–gas shift reaction); − however, only a few TiO 2 –Cu catalysts have been reported for NO3RR. , On the other hand, Deng et al recently reported a considerably enhanced hydrogen evolution reaction on Pt when it was deposited on TiO 2 .…”