Weakened d–p orbital hybridization inin situreconstructed Ru/β-Co(OH)₂heterointerfaces for accelerated ammonia electrosynthesis from nitrates

Abstract

Electrocatalytic nitrate reduction reaction (NtrRR) has recently become an emerging technology that can mildly convert nitrate pollutants into high-value added ammonia products. However, it is highly challenging to develop NtrRR...

The interface-mediated electron structure tuning of RuOx–Co3O4 nano-particles for efficient electrocatalytic nitrate reduction

“…The above-mentioned results support the superior performance RuO x -Co 3 O 4 -5 towards NO 3 RR, possibly due to the electronic reconstruction of the Ru–O–Co bond, and the electron transfer from Ru to Co, leading to the acceleration of the absorption rates of various intermediates such as *NO 3 and *NO 2 . 53 According to previous work, 2,54 the introduction of Ru leads to the formation of the Ru–O–Co bond at the heterogeneous interface of RuO x and Co 3 O 4 , which is also confirmed in this work, leading to the reconfiguration of charge transfer from cobalt from Ru to Co on the interface. Besides, the formation of the Ru–O–Co bond caused by the introduction of Ru lowers the d-band center of the Ru d-orbital, bringing it closer to the Fermi level, thus enhancing the desorption capacity of *NH 3 .…”

“…According to previous research, 2,52 NO 3 RR consists of several reaction pathways, including the absorption of *NO 3 , its subsequent deoxidation (*NO 3 → *NO 2 → *NO → *N), hydrogenation (*N → *NH → *NH 2 → *NH 3 ), and finally the desorption of *NH 3 . The above-mentioned results support the superior performance RuO x -Co 3 O 4 -5 towards NO 3 RR, possibly due to the electronic reconstruction of the Ru–O–Co bond, and the electron transfer from Ru to Co, leading to the acceleration of the absorption rates of various intermediates such as *NO 3 and *NO 2 .…”

“…Additionally, due to the enormous annual production of ammonia, the synthetic ammonia industry consumes approximately 1–2% of the world's energy supply. 2–6 Furthermore, H 2 used in this process is primarily produced from coal or natural gas, and therefore it generates a large amount of carbon dioxide (CO 2 ). 7…”

Laser-controlled tandem catalytic sites of CuNi alloys with ampere-level electrocatalytic nitrate-to-ammonia reduction activities for Zn–nitrate batteries

“…5g and Table S6 (ESI †). 3,[43][44][45][46][47][48][49][50] In addition, NH 3 was collected as liquid ammonia or an ammonium chloride powder from the electrolyte of the Zn-NO 3 À battery, as shown in Fig. S32 and S34 (ESI †).…”

Self-Reconstructed Two-Dimensional Cluster-Based Co–Organic Layer Heterojunctions for Enhanced Oxygen Evolution Reactions

“…To address these issues, the construction of heterojunction structures has emerged as one of the most effective approaches to enhance catalytic performance. Heterojunction structures offer several advantages, including the creation of additional active sites, facilitation of mass and charge transfer, and the emergence of innovative synergistic effects, thanks to their rich interfacial location and specific electron transfer pathways. − Recently, the one-pot method for synthesizing bimetallic MOF/laminated double hydroxide (LDH) heterojunction electrodes allowed for high current densities to be achieved at low overpotentials, with the specific value being an ultralow 159.7 mV (10 mA cm –2 ). Additionally, these electrodes possess long-term durability, indicating their potential for efficient and sustainable applications in energy conversion and electrochemical energy storage .…”