Metallic-Bonded Pt–Co for Atomically Dispersed Pt in the Co₄N Matrix as an Efficient Electrocatalyst for Hydrogen Generation

Abstract

Exploiting highly efficient electrocatalysts toward hydrogen evolution reaction (HER) has a significant role in the mass production of hydrogen energy through water electrolysis. Herein, ginkgo leaf-like Co4N coupled with trace Pt with metallic bond Pt–Co on nickel foam via solvothermal, tannic acid treated, and nitridation procedures for HER (T-Pt-Co4N) is developed. It only requires low overpotentials of 31 mV and 27 mV to achieve 10 mA cm–2 in alkaline and neutral electrolytes, respectively, surpassing the benchmark Pt/C and previously reported values. Moreover, it presents excellent long-term stability in the studied media and also can drive overall water splitting under the assistance of sustainable energies. The specific nanostructure favors the acceleration of the electrocatalytic process by exposing abundant active sites and providing numerous mass transport channels during the catalytic process. Moreover, experimental and theoretical calculation demonstrate that the atomic Pt coordinates with Co to form metallic bond Pt–Co also act as crucial role to boost the electrocatalytic performance by optimizing the reaction kinetics for HER.

Methylthiophenyl- and Methylthiobiphenyl-Substituted A2B CoIIIcorroles: Modulating Electrocatalyzed Hydrogen Evolution Reactions on Surface-Modified Gold Electrodes

“…In order to confirm the Faraday efficiency of 2a – 2d - and 4a – 4c -modified Au electrodes during electrocatalysis, we confirmed the Q values at controlled potential E = −0.503 (vs RHE) and the total amount of H 2 gas produced during electrocatalysis. The produced H 2 was collected by the drainage method. − Before electrolysis, a measuring cylinder was filled with water and inverted in the water tank. A 2-mm-inner-diameter hose connected the sealed electrolysis cell to the water inside the measuring cylinder and ensured that there were no air bubbles inside the cylinder.…”

Hierarchical porous NiFe-P@NC as an efficient electrocatalyst for alkaline hydrogen production and seawater electrolysis at high current density

“…[25][26][27][28] Therefore, the exploration of efficient and highly stable electrocatalysts are crucial to accelerate the development of seawater splitting. [29][30][31] Tremendous efforts have been devoted to exploring efficient nonprecious catalysts. [32][33][34] Among the various materials, transition metal phosphides (TMPs) are attracting greater attention thanks to their excellent intrinsic behaviour, low cost, low toxicity and remarkable resistance to chlorine corrosion.…”

“…25–28 Therefore, the exploration of efficient and highly stable electrocatalysts are crucial to accelerate the development of seawater splitting. 29–31…”

Corrosive engineering assistedin situconstruction of an Fe–Ni-based compound for industrial overall water-splitting under large-current density in alkaline freshwater and seawater media

“…Therefore, it is urgent to realize alternative media in this eld to meet the growing demand for hydrogen. [23][24][25][26][27][28][29] Considering that seawater occupies about 96.5% of the total water reserves, along with the removal of complex desalination and purication technologies, direct water electrolysis in raw seawater is also highly favored in the industry. 30 The water electrolysis in freshwater will lay a foundation for seawater electrolysis.…”

“…Therefore, it is urgent to realize alternative media in this field to meet the growing demand for hydrogen. 23–29…”