Interfacial Strain‐Modulated Nanospherical Ni2P by Heteronuclei‐Mediated Growth on Ti3C2Tx MXene for Efficient Hydrogen Evolution. Issue 45 (19th September 2022)

• Record Type: Journal Article
• Authors: Nguyen, Duong Nguyen; Phu, Thi Kim Cuong; Kim, Jaekyum; Hong, Won Tae; Kim, Jin‐Soo; Roh, Seung Hun; Park, Ho Seok; Chung, Chan‐Hwa; Choe, Woo‐Seok; Shin, Hyeyoung; Lee, Jun Young; Kim, Jung Kyu
• Is Part Of: Small. Volume 18:Issue 45(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-19
• Subjects: hydrogen evolution reaction -- interfacial distortion -- nickel phosphide -- strain engineering -- Ti 3C 2Tx MXene; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202204797
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Interface modulation of nickel phosphide (Ni2 P) to produce an optimal catalytic activation barrier has been considered a promising approach to enhance the hydrogen production activity via water splitting. Herein, heteronuclei‐mediated in situ growth of hollow Ni2 P nanospheres on a surface defect‐engineered titanium carbide (Ti3 C2 T x ) MXene showing high electrochemical activity for the hydrogen evolution reaction (HER) is demonstrated. The heteronucleation drives intrinsic strain in hexagonal Ni2 P with an observable distortion at the Ni2 P@Ti3 C2 T x MXene heterointerface, which leads to charge redistribution and improved charge transfer at the interface between the two components. The strain at the Ni2 P@Ti3 C2 T x MXene heterointerface significantly boosts the electrochemical catalytic activities and stability toward HER in an acidic medium via a combination between experimental results and theoretical calculations. In a 0.5 m H2 SO4 electrolyte, the Ni2 P@Ti3 C2 T x MXene hybrid shows excellent HER catalytic performance, requiring an overpotential of 123.6 mV to achieve 10 mA cm −2 with a Tafel slope of 39 mV dec −1 and impressive durability over 24 h operation. This approach presents a significant potential to rationally design advanced catalysts coupled with 2D materials and transition metal‐based compounds for state‐of‐the‐art high efficiency energy conversions. Abstract : A Ni2 P‐immobilized strategy by using Ti3 C2 T x MXene as support is proposed. Defect‐engineering MXene induces the heteronuclei growth of nanospherical Ni2 P. While surface‐anchored Ni2 P nanospheres possess interfacial strain and hollow structure, the specific interface is responsible for a charge redistribution and optimizes electrochemical activity. Consequently, the hybrid catalyst exhibits low overpotential and high durability for hydrogen electrocatalysis in acidic medium.