TY - JOUR

T1 - Effect of modification of multi-walled carbon nanotubes with nitrogen-containing polymers on the electrochemical performance of Pt/CNT catalysts in PEMFC

AU - Gribov, E. N.

AU - Kuznetsov, A. N.

AU - Golovin, V. A.

AU - Krasnikov, D. V.

AU - Kuznetsov, V. L.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The influence of the surface modification of multi-walled carbon nanotubes (MWCNT) with nitrogen-containing compounds on the performance of 40 wt% Pt/MWCNT catalysts in the oxygen electroreduction reaction (ORR) was investigated using a rotating disk electrode (RDE) at 10–35 °C in 0.1 M HClO 4 as electrolyte in electrochemical cell, and in a hydrogen–oxygen polymer electrolyte membrane fuel cell (PEMFC) at 82 °C. The catalysts were characterized by low-temperature nitrogen adsorption, XPS, TEM, gas-phase CO titration, electrooxidation of the adsorbed CO monolayer, and cyclic voltammetry. It was shown that the modification of MWCNT with melamine–formaldehyde resin leads to the surface nitrogen concentration up to 8.3 at.% (CNT-MF sample). The 40 wt% Pt/CNT-MF catalyst with 0.1 mg cm −2 Pt loading on the cathode showed a good performance in PEMFC (~ 0.61 W cm −2 ) and a high utilization ratio (0.84) of Pt in membrane electrode assembly as compared to Pt/CNT catalyst (~ 0.37 W cm −2 and utilization of 0.29). The higher power density of nitrogen-modified catalysts was ascribed to a higher utilization of Pt in the electrode layer.

AB - The influence of the surface modification of multi-walled carbon nanotubes (MWCNT) with nitrogen-containing compounds on the performance of 40 wt% Pt/MWCNT catalysts in the oxygen electroreduction reaction (ORR) was investigated using a rotating disk electrode (RDE) at 10–35 °C in 0.1 M HClO 4 as electrolyte in electrochemical cell, and in a hydrogen–oxygen polymer electrolyte membrane fuel cell (PEMFC) at 82 °C. The catalysts were characterized by low-temperature nitrogen adsorption, XPS, TEM, gas-phase CO titration, electrooxidation of the adsorbed CO monolayer, and cyclic voltammetry. It was shown that the modification of MWCNT with melamine–formaldehyde resin leads to the surface nitrogen concentration up to 8.3 at.% (CNT-MF sample). The 40 wt% Pt/CNT-MF catalyst with 0.1 mg cm −2 Pt loading on the cathode showed a good performance in PEMFC (~ 0.61 W cm −2 ) and a high utilization ratio (0.84) of Pt in membrane electrode assembly as compared to Pt/CNT catalyst (~ 0.37 W cm −2 and utilization of 0.29). The higher power density of nitrogen-modified catalysts was ascribed to a higher utilization of Pt in the electrode layer.

KW - Multi-walled carbon nanotubes

KW - Nitrogen modification

KW - Nitrogen–carbon nanotubes

KW - Oxygen reduction reaction

KW - Platinum electrocatalyst

KW - Polymer electrolyte membrane fuel cells

KW - Pt utilization

KW - ELECTRODES

KW - PLATINUM CATALYSTS

KW - FUEL-CELLS

KW - Nitrogen-carbon nanotubes

KW - OXYGEN REDUCTION REACTION

KW - ELECTROCATALYSTS

KW - ORR

KW - CO MONOLAYER OXIDATION

KW - CATHODE

KW - SUPPORT

KW - NANOPARTICLES

UR - http://www.scopus.com/inward/record.url?scp=85061661465&partnerID=8YFLogxK

U2 - 10.1007/s40243-019-0143-2

DO - 10.1007/s40243-019-0143-2

M3 - Article

AN - SCOPUS:85061661465

VL - 8

JO - Materials for Renewable and Sustainable Energy

JF - Materials for Renewable and Sustainable Energy

SN - 2194-1459

IS - 1

M1 - 7

ER -