1. School of Engineering, Mechanical and Manufacturing Engineering, University of Birmingham, Birmingham B15 2TT, U.K., Shell Global Solutions, Cheshire Innovation Park, Chester CH1 3SH, U.K., Mechanical Engineering, School of Engineering and Design, Brunel University, West London, Uxbridge UB8 3PH, U.K., and Johnson Matthey Technology Centre, Blount's Court, Sonning Common, Reading RG4 9NH, U.K.