In situ reconstruction enhanced dual-site catalysis towards nitrate electroreduction to ammonia

Abstract

Electro-reduction of nitrate to ammonia (e-NRA) has been considered as a facile and promising approach to eliminate nitrate pollution and produce ammonia (NH3) under ambient conditions. Nevertheless, in recent state-of-the-art...

Hierarchical Nanospheres with Polycrystalline Ir&Cu and Amorphous Cu2O toward Energy‐Efficient Nitrate Electrolysis to Ammonia

“…A variety of electrocatalysts have been developed and applied to NITRR. [13][14][15][16][17][18][19][20][21][22] Nevertheless, most of them proceed in alkaline media with the optimal potentials more negative than −0.27 V RHE or overpotential larger than 0.96 V (see Table S1, Supporting Information). This may lead to the electrochemical reduction of metallic ions and hence catalyst degradation.…”

“…[27][28][29][30][31][32][33] Nevertheless, fewer has been reported for NITRR. [13,21,22,[34][35][36][37][38] In a state-of-the-art work, Chen et al reported a series of noble-metal-dispersed copper nanowires (i.e., M-CuNW, MRu, Os, Rh, Ir) as the catalyst for alkaline NITRR. Among them, the Ru-CuNW exhibited an excellent activity, significantly outperforming all earlier catalysts [13][14][15][16][17][18][19][20][21][22] as well as the reference catalysts including Ir-CuNW.…”

“…[13,21,22,[34][35][36][37][38] In a state-of-the-art work, Chen et al reported a series of noble-metal-dispersed copper nanowires (i.e., M-CuNW, MRu, Os, Rh, Ir) as the catalyst for alkaline NITRR. Among them, the Ru-CuNW exhibited an excellent activity, significantly outperforming all earlier catalysts [13][14][15][16][17][18][19][20][21][22] as well as the reference catalysts including Ir-CuNW. However, our computational study (vide infra) indicates that the Ru and Irdispersed analogs have almost comparable activities in terms of their similar adsorption free energy of nitrate (∆G *NO3 ).…”

In Situ Growth of Fe2O3 Nanorod Arrays on Carbon Cloth with Rapid Charge Transfer for Efficient Nitrate Electroreduction to Ammonia

“…Moreover, powder noble-metal-based electrocatalysts need to be coated on conductive substrates, which inevitably increases the resistance and inhibits mass/charge transport. − In recent years, the development of self-supporting catalysts has received considerable attention. , The self-supporting strategy provides a fast electron-transport channel between the conductive substrates and catalysts, which accelerates the charge-transport rate, facilitates the reaction, and has made substantial progress in the field of carbon dioxide reduction and overall water electrolysis. − In addition, self-supporting materials can avoid the use of conducting binders, and excellent mechanical properties can improve their usage rate, which is a prospective strategy to promote the performance of the electrocatalyst and broaden its application range. − Hence, combining the Fe 2 O 3 nanostructure with a self-supporting strategy to prepare an integrated catalyst for electrocatalytic NO 3 RR to NH 3 is attractive.…”

The selective electrocatalytic reduction of nitrate to ammonia using Co(ii)-decorated TiO2nanosheets

“…13,14 Among them, the electrocatalytic nitrate-to-ammonia reduction reaction (NARR) has been found to be unique and more thermodynamically approachable and feasible under ambient conditions. [15][16][17][18][19][20][21] Switching of the starting raw material from regular nitrogen to nitrate bypasses the difficult dinitrogen splitting step, which is more easily fullled via a nitrogen oxidation process. 4,22,23 Traditionally, nitrate production is more favourable, than ammonia synthesis, in terms of energy saving and conversion efficiency based on available industrial approaches.…”