High-Current-Density Glycerol Electrooxidation on S–Cu–Ni/NF Catalyst: Unveiling the Synergy between S-Promoted GOR and Cu-Inhibited OER DOI
Lixiong Xu,

Shuo Geng

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

Electrocatalytic glycerol oxidation reaction (GOR) coupled with hydrogen evolution (HER) is an ideal method to achieve efficient production. However, realizing the stable degradation of formate at high current densities still faces great challenges, mainly stemming from competition between GOR and oxygen (OER) potentials. To address this issue, in study, S-Cu-Ni/NF catalysts were successfully synthesized using Cu-Ni/NF as precursors. The introduction Cu effectively suppressed OER, enabling more than 75% Faraday efficiency over a wide potential range 1.3 V vs RHE 1.6 RHE. Meanwhile, S doping significantly enhanced electron transport ability GOR, catalyst density 100 mA cm-2 low 1.395 In addition, after 24 h continuous operation cm-2, increased by only 40 mV, demonstrating excellent stability. Scanning microscopy energy dispersive spectra (SEM-EDS), X-ray photoelectron (XPS) situ Raman characterization confirmed that precipitation promoted formation active site NiOOH its dynamic growth during process. present study not improved selectivity potentials inhibiting OER but also performance, demonstrated densities, provided feasible strategy for industrial application hydrogenolysis.

Язык: Английский

Bimetallic Ni–Co-MOF Nanostructures for Seawater Electrolysis: Unveiling the Mechanism of the Oxygen Evolution Reaction Using Impedance Spectroscopy DOI
Pitchai Thangasamy, Truong‐Giang Vo,

Raghunath Venkatramanan

и другие.

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Designing anode electrodes with long-term stability and efficiency for seawater electrolysis is crucial addressing key challenges in sustainable hydrogen production clean energy systems. Here, we developed self-supporting bimetallic Ni–Co-MOF electrodes, demonstrating exceptional performance durability alkaline due to their high voltammetric charge density increased electrochemically accessible active sites. The reaction kinetics of the water oxidation presence Cl– ions (at concentrations ranging from 0.5 M 3.5 M) were investigated through electrochemical impedance spectroscopy (EIS) analysis, focusing on kinetic parameters, suggesting that rate-determining step (RDS) chemical process following initial electron transfer. Notably, electrolyte medium do not alter OER rate-limiting step, as indicated by negligible variations anodic transfer coefficient values. However, blocking sites evident decrease interfacial capacitance (Cchem) values increasing concentration. These findings offer a deeper understanding chloride-containing environments correlating parameters site availability. This work highlights critical considerations designing efficient durable anodes electrolysis.

Язык: Английский

Процитировано

0
Binder-Free HfNi-Doped WO3 Bifunctional Electrocatalysts for Efficient Seawater Electrolysis DOI
Mahesh Itagi, Deepak Chauhan, Young‐Ho Ahn

и другие.

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 14, 2025

Язык: Английский

Процитировано

0
High-Current-Density Glycerol Electrooxidation on S–Cu–Ni/NF Catalyst: Unveiling the Synergy between S-Promoted GOR and Cu-Inhibited OER DOI
Lixiong Xu,

Shuo Geng

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

Electrocatalytic glycerol oxidation reaction (GOR) coupled with hydrogen evolution (HER) is an ideal method to achieve efficient production. However, realizing the stable degradation of formate at high current densities still faces great challenges, mainly stemming from competition between GOR and oxygen (OER) potentials. To address this issue, in study, S-Cu-Ni/NF catalysts were successfully synthesized using Cu-Ni/NF as precursors. The introduction Cu effectively suppressed OER, enabling more than 75% Faraday efficiency over a wide potential range 1.3 V vs RHE 1.6 RHE. Meanwhile, S doping significantly enhanced electron transport ability GOR, catalyst density 100 mA cm-2 low 1.395 In addition, after 24 h continuous operation cm-2, increased by only 40 mV, demonstrating excellent stability. Scanning microscopy energy dispersive spectra (SEM-EDS), X-ray photoelectron (XPS) situ Raman characterization confirmed that precipitation promoted formation active site NiOOH its dynamic growth during process. present study not improved selectivity potentials inhibiting OER but also performance, demonstrated densities, provided feasible strategy for industrial application hydrogenolysis.

Язык: Английский

Процитировано

0