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To understand the role of functional groups and defects in improving the anti-poisoning performance of platinum (Pt) catalysts for formate oxidation, four kinds of supports originated from carbon nanotubes (CNTs) were prepared with varying amounts of functional groups (FGs) and varying degrees of defects. Pt particles with controlled similarity were deposited onto the four supports for precisely comparing the difference between the four supports. The catalysts structures were characterized using X-ray diffraction, high-resolution transmission electron microscope, Raman spectra and X-ray photoelectron spectra. The electrochemical performances of the four catalysts were characterized [a] Prof. J. Wang School of Chemical Engineering and Energy Zhengzhou University Science Road 100, Zhengzhou 450000 (China) E-mail: wangjs07@ zzu. edu. cn [b] Prof. Wang, Dr. C. Liu, Dr. B. Wei, Dr. N. Cheng, A. Riese, M. Banis, Prof. X. Sun Department of Mechanical and Materials Engineering The University of Western Ontario, ON, N6A 5B9 (Canada) E-mail: xsun@ eng. uwo. ca [c] Dr. C. Liu School of Materials Science & Engineering Changzhou University Changzhou 213164 (China)