Proton Hopping (IMAGE) Waseda University Caption This is an illustration of proton hopping during catalytic reaction. Credit Waseda University Usage Restrictions Only for non-commercial use and with credit "Waseda University" License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.