Constructing Ni₃Se₂‐Nanoisland‐Confined Pt₁Mo₁ Dual‐Atom Catalyst for Efficient Hydrogen Evolution in Basic Media

Abstract

Constructing efficient and stable catalysts is the key to achieving green hydrogen production through electrolysis of water. Atomically dispersed catalysts have received widespread attention due to their high atomic utilization and catalytic efficiency. Herein, Pt1Mo1 dual‐atom catalysts anchored on the nickel selenide nanoisland (Pt1Mo1/Ni3Se2) are prepared by a two‐step method. It only needs 53 mV to deliver the current density of 10 mA cm−2 in 1 M KOH media, and the mass activity at 200 mV is approximately 4.13 times higher than that of Pt/C. In addition, the Pt1Mo1/Ni3Se2 also exhibits electrochemical stability of nearly 60 h at 20 mA cm−2. It is shown in the studies that the synergistic effect between Pt and Mo atoms enables the migration of electrons around Mo atoms toward Pt, thus realizing charge redistribution. Further density functional theory calculations verify that synergistic effect of Pt and Mo atoms could optimize the adsorption of H*, enhancing the hydrogen evolution reaction activity. Moreover, the Ni3Se2 nanoisland prevents the aggregation of Pt and Mo dual atom, effectively improving the stability of the catalyst. In this work, a nanoisland confined strategy is provided to construct atomically dispersed catalysts with high activity and stability for water splitting.

Heteronuclear Dual Metal Atom Electrocatalysts for Water-Splitting Reactions

“…Combining the experimental results and density functional theory calculations, the introduction of Mo atoms can effectively regulate the hydrogen adsorption energy of Pt sites and boost the HER activity. Generally, the synergistic effect between Pt and Mo sites can realize the charge redistribution, thus optimizing the adsorption of H* and enhancing the electrochemical performance [68]. This work provides a new strategy for the development of DAC, which is compatible with commercial Pt/C in alkaline media.…”

“…DASs/N-C 189 mV in 1 M KOH 260 mV in 0.5 M H2SO4 72.5 mV dec −1 in 1 M KOH and 82.4 mV dec −1 0dec −1 in 1 M KOH[38] W1Mo1-NG 24 mV in 0.5 M H2SO4 and 67 mV in 1 M KOH 30 mV dec −1 in 0.5 M H2SO4 and 45 mV dec −1 in 1 M KOH[42] Ru/Co-N-C-800 °C 19 mV in 1 M KOH and 17 mV in 0.5 M H2SO4 27.8 mV dec −1 in 1 M KOH and 23.3 mV dec −1 in 0.5 dec −1 in 1 M KOH[68] …”

Heteronuclear Dual Metal Atom Electrocatalysts for Water-Splitting Reactions

“…Further density functional theory calculations indicate that the introduction of Mo atoms can effectively regulate the hydrogen-adsorption energy of Pt sites and boost the HER activity. Generally, the synergistic effect between Pt and Mo sites can realize the charge redistribution, thus optimizing the adsorption of H* and improving the HER performance [55].…”

Constructing Chainmail-Structured CoP/C Nanospheres as Highly Active Anodic Electrocatalysts for Oxygen Evolution Reaction

“…With the dramatic increase in demand for sustainable and clean energy, hydrogen energy has attracted wide attention because of its huge energy density and environmental friendliness. , Water electrolysis may be the best option for commercial hydrogen production due to its high product purity and production efficiency. , As a critical half-reaction in water splitting, the oxygen evolution reaction (OER) requires robust catalysts to achieve efficient and sustainable oxygen production. , To date, Ir/Ru-based materials are considered state-of-the-art catalysts for OER, while the high cost and scarcity of noble metals have become their obstacles for commercial application. − Therefore, it is imperative to exploit high-efficiency, low-cost, and ultrastable non-noble metal OER electrocatalysts.…”

“…1,2 Water electrolysis may be the best option for commercial hydrogen production due to its high product purity and production efficiency. 3,4 As a critical half-reaction in water splitting, the oxygen evolution reaction (OER) requires robust catalysts to achieve efficient and sustainable oxygen production. 5,6 To date, Ir/Ru-based materials are considered state-of-the-art catalysts for OER, while the high cost and scarcity of noble metals have become their obstacles for commercial application.…”