'Clean' hydrogen? Comparing the emissions and costs of fossil fuel versus renewable electricity based hydrogen

Engineering & Materials Science

• Carbon capture 100%
• Fossil fuels 80%
• Hydrogen 64%
• Electricity 59%
• Costs 31%
• Electrolysis 26%
• Gas emissions 23%
• Greenhouse gases 23%
• Carbon 17%
• Decarbonization 16%
• Hydrogen production 13%
• Feedstocks 11%
• Supply chains 11%
• Coal 9%
• Renewable energy resources 9%
• Gases 6%

Earth & Environmental Sciences

• fossil fuel 74%
• electricity 71%
• carbon sequestration 64%
• hydrogen 63%
• cost 42%
• electrokinesis 21%
• greenhouse gas emissions 20%
• carbon 19%
• national strategy 16%
• production system 12%
• rate 11%
• alternative energy 10%
• price 9%
• coal 7%
• gas 5%