Metallic Metastable Hybrid 1T′/1T Phase Triggered Co,PSnS₂ Nanosheets for High Efficiency Trifunctional Electrocatalyst

Abstract

The development of trifunctional electrocatalyst for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) with deeply understanding the mechanism to enhance the electrochemical performance is still a challenging task. In this work, the distorted metastable hybrid‐phase induced 1T′/1T Co,PSnS2 nanosheets on carbon cloth (1T′/1T Co,PSnS2@CC) is prepared and examined. The density functional theoretical (DFT) calculation suggests that the distorted 1T′/1T Co,PSnS2 can provide excellent conductivity and strong hydrogen adsorption ability. The electronic structure tuning and enhancement mechanism of electrochemical performance are investigated and discussed. The optimal 1T′/1T Co,PSnS2@CC catalyst exhibits low overpotential of ≈94 and 219.7 mV at 10 mA cm−2 for HER and OER, respectively. Remarkably, the catalyst exhibits exceptional ORR activity with small onset potential value (≈0.94 V) and half‐wave potential (≈0.87 V). Most significantly, the 1T′/1T Co,PSnS2||Co,PSnS2 electrolyzer required small cell voltages of ≈1.53, 1.70, and 1.82 V at 10, 100, and 400 mA cm−2, respectively, which are better than those of state‐of‐the‐art Pt‐C||RuO2 (≈1.56 and 1.84 V at 10 and 100 mA cm−2). The present study suggests a new approach for the preparation of large‐scalable, high performance hierarchical 3D next‐generation trifunctional electrocatalysts.

Rational Design of Dendritic Phase‐Pure Tin Antimonide Intermetallic Film‐Based Negatrodes for Commercially‐Viable Flexible Sodium‐Ion Pouch Cell Battery

“…[34] Deconvoluted XPS spectra of Sn3d and Sb3d regions are presented in Figure S9b,c (Supporting Information), respectively. Peaks appearing at 486 and 494.6 eV arise from 3d 5/2 and 3d 3/2 photoelectron emissions of metallic tin atoms (Sn(0)), [35] and peaks appearing at 530 and 539 eV arise from the 3d 5/2 and 3d 3/2 photoelectron emissions of metallic antimony atoms (Sb(0)), [36] respectively. Some additional photoelectron emission intensity at 530 eV is also contributed by the O1s emission that lies in close proximity of the Sb 3d 5/2 emission.…”

A critical review on amorphous–crystalline heterostructured electrocatalysts for efficient water splitting

“…For industrial applications, the ability of the electrocatalysts to function at various high current densities and low cell voltages is crucial. 99 Retaining long-term stability and functioning well while enduring high-intensity gas evolution for practical water electrolysis is highly difficult for the catalyst. Interestingly, heterostructures with amorphous–crystalline interfaces have recently been shown to significantly improve the catalytic performance of materials at high current densities.…”

Unraveling the Impact of Curvature on Electrocatalytic Performance of Carbon Materials: A State‐of‐the‐Art Review

“…[11] These electrocatalytic reactions based on small molecules are fundamental for driving future transformations in energy systems. [12,13] However, the practical application of these electrocatalytic reactions faces significant hurdles due to slow kinetics and complex reaction pathways. [14][15][16] Consequently, cutting-edge international research is concentrated on the design and development of high-performance electrocatalysts, aiming to overcome these obstacles.…”