The effects of a high-pressure hydrogen environment on friction and wear of polymers is of importance to several applications in hydrogen station infrastructure applications such as compressor seals and valves. While much is known about damaging embrittlement effects of hydrogen in metals, much less is known about the effects on polymers. Previous investigations have however shown that polymers may exhibit compatibility issues with hydrogen. Here we present initial studies of frictional behavior in 28 MPa hydrogen (99.995% purity) on nitrile butadiene rubber in a custom-built, in-situ tribometer for hydrogen. Results are compared to ambient air conditions.