Pt nanowire/Ti3C2Tx-CNT hybrids catalysts for the high performance oxygen reduction reaction for high temperature PEMFC

A comprehensive review of MXenes as catalyst supports for the oxygen reduction reaction in fuel cells

“…Wang et al exploited electrostatic interactions to hybridize negatively charged Ti 3 C 2 T x with positively charged CTAB-grafted CNTs and used the hybrid as the support for Pt nanowires. 60 The Pt NW/Ti 3 C 2 T x -CNT catalyst exhibits an E onset of 1.02 V vs RHE with a 63.59 m 2 g À1 ECSA, higher than that of Pt/C (E onset of 0.92 V vs RHE and ECSA of 51.53 m 2 g À1 ). This hybridization also results in the higher mass activity (MA) and specific activity (SA) of the catalyst, 0.21 mA cm À2 and 0.38 A mg À1 , respectively; this could be explained by the good synergistic effect between the 1-dimensional (1D) Pt NWs, which enhances electron transport, and Ti 3 C 2 T x -CNT, which provides more defect sites for Pt NW anchoring.…”

“…[18][19][20][21][22][23] In the past few years, MXenes have been explored and studied for use in many other applications, such as in electronics, [24][25][26][27] biomedicine, 28,29 sensors, [30][31][32][33][34][35][36][37] biosensors, [38][39][40][41][42][43][44] photothermal conversion, [45][46][47] water purification, [48][49][50][51] and even in the field of catalysis. [52][53][54][55][56][57][58][59] Having a 2D structure similar to that of graphene but better conductivity, MXenes is widely studied for use as an electrocatalyst in clean energy conversion reactions, such as the ORR, 60 methanol oxidation reaction (MOR), 61,62 nitrogen reduction reaction (NRR) 63,64 and electrochemical water splittin...…”

Recent advances in noble metal MXene-based catalysts for electrocatalysis

“…Cheng et al loaded Pt nanoparticles on the MXene/CNT composite carrier, which effectively solved the accumulation problem of MXene nanosheets. 104 Under the synergistic effect of Ti 3 C 2 T x and CNT, Pt/CNT–Ti 3 C 2 T x (1 : 1) exhibited superior ORR catalytic activity and stability. Wu et al used density functional theory to study the potential of composite catalysts loaded with transition metal single atoms (Pt, Ag, Au, Pd, Ni, and Con V 2 C MXene in ORR catalysis (Fig.…”

Recent Advances on MXene‐Based Electrocatalysts toward Oxygen Reduction Reaction: A Focused Review

“…This low value of "n" clearly indicates that the ORR activity of the stacked Pt/Ti 3 C 2 X 2 catalyst is not ideal for ORR catalysis. To mitigate the restacking and improve the charge transfer ability of Ti 3 C 2 X 2 , Wang et al [102] used CTAB-CNTs as spacers between Ti 3 C 2 X 2 sheets. The CNTs were observed to be tightly bound to Ti 3 C 2 X 2 via electrostatic interactions between the negatively charged Ti 3 C 2 X 2 and positively charged CTAB-carbon.…”

“…Reproduced with permission. [ 102 ] Copyright 2020, Elsevier. d) CV and e) LSV curves for Pt/CNT–Ti 3 C 2 T x , Pt/Ti 3 C 2 T x , Pt/C, and Pt/CNT catalysts.…”