Development of effective bimetallic catalyst for high‐temperature PEM fuel cell to improve CO tolerance

Abstract

Summary In this study, it is aimed to examine the effect of multi‐walled carbon nanotube doped graphene nanoplatelet (MWCNT‐GNP) supported PtPd bimetallic catalyst on the performance of the high‐temperature proton‐exchange membrane fuel cell (HT‐PEMFC). In addition, PtPd/GNP and PtPd/MWCNT bimetallic catalysts were also investigated for performance comparison. The characterizations of these catalysts were examined by ICP‐MS, XRD, HR‐TEM, and TGA analysis. The electrochemical characterizations of the catalysts were performed for both cyclic voltammetry (CV) and CO stripping experiments, as well as HT‐PEMFC tests. The specific surface area (SSA) for PtPd/GNP and PtPd/MWCNT catalysts was obtained as 148 and 137 m2/g, respectively, while the highest SSA was achieved as 164 m2/g for PtPd/MWCNT‐GNP. The performance of the catalysts was confirmed with the HT‐PEMFC tests, based on the H2/air and reformate gas/air experiments. The electrocatalytic results display that PdPt bimetallic catalysts exhibited higher catalytic property than that of commercial Pt/C catalyst. The highest performance was achieved with PtPd/MWCNT‐GNP catalyst as 0.390 and 0.310 W/cm2 at 160°C for H2/air and reformat/air, respectively. The obtained results indicate that the PtPd/MWCNT‐GNP catalyst is appropriate for HT‐PEMFC operations.

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

“…The PdRu/MWCNT‐GNP catalysts were synthesized via microwave‐assisted synthesis method described in our previous work 43 . As a typical process for the synthesis of PdRu catalyst with the metal loading of 30 wt%, 50 mg MWCNT‐GNP support materials were dispersed in a mixture of 24 mL EG and 6 mL IPA was mixed with ultrasonic bath for 1 hour.…”

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

“…Fair number of attempts have also been made to prepare supported simple metal oxide (CoO x , Co 3 O 4 , NiO, Fe 3 O 4 , SnO 2 , CeO 2 , TiO 2 ) nanocatalysts for application in petrochemical industry. 75,[160][161][162][163][164][165][166] In order to improve the catalytic activity as well as versatility in application potential of simple metal or metal oxide nanocatalysts, investigations on supported bimetal, [171][172][173][174][175][177][178][179][180][181][182][183][184][185][186][187] mixed metal oxide [188][189][190][191][192][193]196,197 and ternary metal 198,199 nanocatalysts are also available. MW assisted synthesis has been claimed to be economically viable short green method to produce supported nanocatalyst.…”

“…In this regard, anchoring or mobilization of nanocatalyst to inert or catalytically active support could help to improve the catalyst life time through inhibiting leaching, enhancing stability, less poisoning and maintaining the nano-size distribution. 81,87,88,[90][91][92]95,99,111,112,132,141,142,145,146,158,162,166,[171][172][173][175][176][177][178][179][180]182,183,186,190,198,199 MW assisted reduction in presence of reducing agents or under H 2 pressure, 98,[106][107][108][109]116,121,[127][128][129][130]133,134,161,…”

“…In many cases improved electrochemical performance with improved durability was observed for MW synthesized electrocatalysts compared to the reference/commercial Pt/C electrocatalyst. 92,145,165,171,173,178,[180][181][182]187,199 The synergistic coupling effect, smaller size, electronic and ionic effect helped to improve the electrocatalytic performance of binary and ternary metal nanocatalysts. Continuous irradiation rather than pulsed mode of irradiation was found to possess better electrocatalytic activity and better CO antipoisoning ability.…”

“…Downloaded on 12/13/2021 2:03:20 AM.This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. MWCNT-GNP catalyst was found to possess the highest electrochemical stability and durability compared to PtPd/MWCNT and PtPd/GNP catalysts 182. This behavior was ascribed to better dispersion, smaller NP size and highest specific surface area (164 m 2 /g).The electrochemical activity of Co 3 O 4 @SUS electrode towards OER in water splitting was compared with reference materials including commercial RuO 2 @SUS and Co 3 O 4 -LNS@SUS catalysts 165.…”