A step towards efficient water splitting: a high-performance CuCo(OH)2/CNT/MoS2 electrocatalyst DOI

Sahana Raju,

M Darshan,

H Bhanupriya

et al.

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A high-performance CuCo(OH)2/CNT/MoS2 composite electrocatalyst was synthesized by rapid co-precipitation. This bifunctional material exhibits exceptional electrochemical properties, achieving low overpotentials of 65 mV (OER) and 211 (HER) at η10, with Tafel slopes 96 dec-1 110 dec-1. Notably, demonstrates remarkable durability, sustaining its activity for more than 40 hours in alkaline 25 acidic media, accompanied minimal charge transfer resistance. Overall water splitting (OWS) needs a mere 170 (1.40 V) extra energy over the thermodynamic potential, whereas after stability test (15 hours), excess potential drops down to 70 (1.30 V). The catalytic quantified through turnover frequency (TOF) values 1.9 × 10-3 s-1 3.8 (HER), mass activities 20.29 g-1 21.06 (HER). Moreover, achieves faradaic efficiency above 80% OER process. synergistic combination CuCo(OH)2 (OER active sites) MoS2 (edge S as HER active) CNT enhances electrical conductivity surface area, boosting performance.

Language: Английский

Enhanced the Overall Water Splitting Performance of Quaternary NiFeCrCo LDH: Via Increasing Entropy DOI Creative Commons
Xin Liu, Li Bai, Xinrong Guo

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1461 - 1461

Published: March 25, 2025

The construction of high-performance catalysts for overall water splitting (OWS) is crucial. Nickel–iron-layered double hydroxide (NiFe LDH) a promising catalyst OWS. However, the slow kinetics HER under alkaline conditions seriously hinder application NiFe LDH in This work presents strategy to optimize OWS performance by adjusting entropy multi-metallic LDH. Quaternary NiFeCrCo was constructed, which exhibited remarkable activity. OER and were stable 100 h 80 h, respectively. activity LDH//NiFeCrCo only required 1.42 V reach 10 mA cm−2, cm−2 1.54 V. Under simulated seawater conditions, 1.57 1.71 cm−2. introduction Co into structure induced Cr provide more electrons Fe, regulated electronic state appropriate essential proposes new achieve excellent through entropy-increase engineering.

Language: Английский

Citations

0
A step towards efficient water splitting: a high-performance CuCo(OH)2/CNT/MoS2 electrocatalyst DOI

Sahana Raju,

M Darshan,

H Bhanupriya

et al.

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A high-performance CuCo(OH)2/CNT/MoS2 composite electrocatalyst was synthesized by rapid co-precipitation. This bifunctional material exhibits exceptional electrochemical properties, achieving low overpotentials of 65 mV (OER) and 211 (HER) at η10, with Tafel slopes 96 dec-1 110 dec-1. Notably, demonstrates remarkable durability, sustaining its activity for more than 40 hours in alkaline 25 acidic media, accompanied minimal charge transfer resistance. Overall water splitting (OWS) needs a mere 170 (1.40 V) extra energy over the thermodynamic potential, whereas after stability test (15 hours), excess potential drops down to 70 (1.30 V). The catalytic quantified through turnover frequency (TOF) values 1.9 × 10-3 s-1 3.8 (HER), mass activities 20.29 g-1 21.06 (HER). Moreover, achieves faradaic efficiency above 80% OER process. synergistic combination CuCo(OH)2 (OER active sites) MoS2 (edge S as HER active) CNT enhances electrical conductivity surface area, boosting performance.

Language: Английский

Citations

0