PtNi Alloy Coated in Porous Nitrogen-Doped Carbon as Highly Efficient Catalysts for Hydrogen Evolution Reactions

Abstract

The development of low platinum loading hydrogen evolution reaction (HER) catalysts with high activity and stability is of great significance to the practical application of hydrogen energy. This paper reports a simple method to synthesize a highly efficient HER catalyst through coating a highly dispersed PtNi alloy on porous nitrogen-doped carbon (MNC) derived from the zeolite imidazolate skeleton. The catalyst is characterized and analyzed by physical characterization methods, such as XRD, SEM, TEM, BET, XPS, and LSV, EIS, it, v-t, etc. The optimized sample exhibits an overpotential of only 26 mV at a current density of 10 mA cm−2, outperforming commercial 20 wt% Pt/C (33 mV). The synthesized catalyst shows a relatively fast HER kinetics as evidenced by the small Tafel slope of 21.5 mV dec−1 due to the small charge transfer resistance, the alloying effect between Pt and Ni, and the interaction between PtNi alloy and carrier.

Recent advances towards increasing the Pt utilization efficiency for hydrogen evolution reaction: a review

“…Similarly, Tang et al coated a highly dispersed PtNi alloy on porous nitrogen-doped carbon. 78 To give context, metal organic frameworks (MOF) have been used for electrocatalyst development as they can provide a high specific surface area and the ability to easily regulate pore sizes in addition to the coordination center of metal atoms. Zeolite imidazolate frameworks (ZIFs) are a division of MOF materials that usually incorporate Co 2+ and Zn 2+ as a metal source with an imidazole organic linker and form popular MOFs for building catalysts in general.…”

Low content of Ni‐Pt nanoparticles decorated carbon nanofibers as efficient electrocatalyst for hydrogen evolution reaction

“…In recent years, a wide range of transition metals and nonprecious metal-based hybrid materials have been developed for electrocatalytic HER and oxygen evolution reaction (OER) water splitting. [29][30][31][32][33][34][35][36][37] In the present work, low content of nickel (Ni) and Pt NPs decorated CNF (Ni-Pt/CNFs) were prepared using a simple and efficient approach that combines electrospinning and calcination process. Morphological and energy dispersive X-ray (EDX) analysis revealed that the low content of Ni-Pt NPs is dispersed on the CNF surface.…”

“…As a result, PAN‐based CNFs have a wide range of applications as substrate components for an improved electrochemical catalytic response. In recent years, a wide range of transition metals and nonprecious metal‐based hybrid materials have been developed for electrocatalytic HER and oxygen evolution reaction (OER) water splitting 29‐37 …”

Tunable Pt–Ni Interaction Induced Construction of Disparate Atomically Dispersed Pt Sites for Acidic Hydrogen Evolution

“…In recent years, introducing heterogeneous metal structures is demonstrated to be one of the most effective strategies for developing highly active and inexpensive Pt-based catalysts. − Undoubtedly, Ni is attracting much attention due to the potential to be combined with Pt to generate alloys to enhance the dispersibility of Pt and the electrocatalytic HER capability. , Besides, carbon-encapsulated metal catalysts have various advantages in HER, including stable skeleton structure and excellent corrosion resistance to acidic or alkaline electrolytes. − Therefore, the combination and dispersion of Pt inside bulk Ni to form Pt–Ni alloys on conductive carbon material are ingenious approaches to rationalize the design of Pt-based catalysts . Meanwhile, single-atom catalysts have attracted much attention due to the high HER activity at low metal loadings, so introducing this concept into the design of Pt–Ni alloy catalysts can further reduce the cost of Pt-based catalysts. , Finally, direct insights into the contributions of Ni–Pt alloys to HER activity are rarely available, so it is essential to investigate the mechanism of enhancing the performance of Ni–Pt alloys for HER in acid electrolytes.…”

“…15−17 Undoubtedly, Ni is attracting much attention due to the potential to be combined with Pt to generate alloys to enhance the dispersibility of Pt and the electrocatalytic HER capability. 18,19 Besides, carbon-encapsulated metal catalysts have various advantages in HER, including stable skeleton structure and excellent corrosion resistance to acidic or alkaline electrolytes. 20−22 Therefore, the combination and dispersion of Pt inside bulk Ni to form Pt−Ni alloys on conductive carbon material are ingenious approaches to rationalize the design of Pt-based catalysts.…”