Achieving Phase Control of Polymorphic Tungsten Carbide Catalysts.

ABSTRACT: The polymorphism of tungsten carbide (W _x C) and the challenge of selectively synthesizing pure phases have impeded a precise understanding of catalytic structure-property relationships. This study establishes a framework for phase-selective synthesis of W _x C through controlling carburization kinetics. By maintaining particle sizes below 10 nm, β-W₂C is selectively synthesized using gaseous carbon precursors (CH₄/H₂) via temperature-programmed carburization (TPC). Our findings reveal that W₂C stabilization is predominantly dictated by particle size and carburization kinetics rather than support interactions, providing a tunable approach to synthesize tungsten carbide catalysts. We elucidate the mechanistic pat

SUBMITTER: Perera SMHD 

PROVIDER: S-EPMC12813974 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature