Platinum Clusters Anchored Amorphous NiMo Hydroxide with Collaborative Electronic Transfer for Overall Water Splitting under High Current Density

Abstract

The development of efficient and stable bifunctional catalysts to meet overall water splitting at high current densities is attractive, but also challenging. Here, a simple one‐step chloride ion etching method to in situ synthesis of platinum (Pt) clusters anchored on amorphous nickel molybdenum hydroxide/nickel foam nanosheets (Pt‐NiMo‐OH/NF) at room temperature is used. Pt‐NiMo‐OH/NF has better catalytic activity for hydrogen evolution and oxygen evolution (OER) than Pt/C/NF and RuO2/NF. The overall water splitting required only 1.83 V versus RHE to reach 1000 mA cm−2, and showed good stability and catalytic activity in 160 h. The excellent catalytic performance and stability of Pt‐MiMo‐OH/NF may be due to the collaborative electron transfer between Pt and amorphous NiMo‐OH leads to an increase in the electron density of Pt clusters, which optimizes the binding energy of Pt and H. At the same time, it induces the formation of high‐valence Ni and Mo, thereby promoting the dissociation of water and the production of OER active substances. This work provides a novel strategy for the synthesis of water splitting catalysts at high current density.

Pt‐Quantum‐Dot‐Modified Sulfur‐Doped NiFe Layered Double Hydroxide for High‐Current‐Density Alkaline Water Splitting at Industrial Temperature

“…[3] Therefore, exploring highly active and cost-effective electrocatalysts with high hydrogen output is imperative but challenging.Recently, essential breakthroughs and significant progress have been achieved in inexpensive transition-metal-based catalysts for water splitting with suitable performance in the laboratory, such as Pt/Ni-Mo, [4] FeIr alloy, [5] MoS 2 , [6] and Pt-NiMo-OH/nickel foam (NF). [7] Nevertheless, the gap between fundamental science and industrial expectation is still difficult to bridge. [8] At the research stage in the laboratory, the activities of catalysts are usually evaluated by loading powder samples on the current collector (e.g., glassy carbon) via binders (e.g., Nafion) and testing them at a relatively small current density.…”

Pathways towards Achieving High Current Density Water Electrolysis: from Material Perspective to System Configuration

“…Currently, Pt group metal (PGM) electrocatalysts have been recognized as the benchmark catalyst for water splitting owing to their exceptional performance, low overpotentials, good stability, and commercial applicability. [104][105][106][107] PGM catalysts such as Pt have been profoundly applied for HER, while oxides of Ru and Ir have been widely used for OER. [104,[108][109][110] However, PGM catalysts consist of expensive rare earth metals, and some derive from unjust mining practices, leading to sustainability issues.…”

Synthesis and Electrochemical Properties of One‐Dimensional γ‐MnOOH Nanorods

“…[1][2][3] As a new type of energy storage device, supercapacitors are considered to be one of the most promising energy storage components, with the advantages of high power density greater than 10 kw/kg, fast charging and discharging, and long service life Electrode material is the most important factor affecting the performance of supercapacitors. [4][5][6][7][8][9][10][11][12][13][14][15][16] In recent years, manganese oxides have attracted much attention in the field of supercapacitors due to their advantages such as abundant resources, environmental friendliness, and high theoretical specific capacity. [17][18][19][20][21][22][23][24][25][26][27] MnOOH, as a trivalent hydroxide polycrystalline material stable at room temperature with easy preparation and flexible structure, as well as higher conductivity (10 À 4 -10 À 5 S/cm) compared to MnO 2 , is considered a promising candidate for supercapacitor electrode materials.…”